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Acid-steam-assisted preparation method of nickel-iron hydrotalcite nanosheet-foamed nickel

A technology of nickel foam and molten nickel iron, which is applied in the direction of nanotechnology, electrolytic components, electrodes, etc., can solve the problems of high energy consumption, high pollution costs, inconvenient large-scale production, etc., achieve low cost, expand production scale, and improve electrocatalysis The effect of oxygen evolution activity

Active Publication Date: 2021-04-23
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, high pollution, high cost and inconvenient large-scale production of high-performance nickel-iron hydrotalcite catalytic electrodes

Method used

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  • Acid-steam-assisted preparation method of nickel-iron hydrotalcite nanosheet-foamed nickel
  • Acid-steam-assisted preparation method of nickel-iron hydrotalcite nanosheet-foamed nickel
  • Acid-steam-assisted preparation method of nickel-iron hydrotalcite nanosheet-foamed nickel

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Experimental program
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Embodiment 1

[0022] The preparation method of a kind of acid steam-assisted nickel-iron hydrotalcite nanosheet-nickel foam of the present embodiment is carried out according to the following steps:

[0023] a. Dissolve ferric chloride in deionized water to prepare a 25mmol / L ferric chloride solution, and soak the degreased nickel foam in the above ferric chloride solution. After immersion and ultrasonication for 5 minutes, the foam nickel Take it out, and dry it for 30 minutes at room temperature; the ratio of the foamed nickel area to the volume of the ferric chloride solution is 0.4cm 2 / ml;

[0024] B, the nickel foam after step a is processed is placed in acid-resistant container, and the open bottle that fills 5ml concentrated nitric acid solution is placed in this container to guarantee the acidic steam atmosphere in the airtight container;

[0025] c. Close the container in step b, then close the system again and keep it at 50°C for 12 hours. After cooling, open the closed containe...

Embodiment 2

[0027] The only difference between this embodiment and embodiment 1 is that the concentration of ferric chloride solution in step a is 15mmol / L.

Embodiment 3

[0029] The only difference between this embodiment and embodiment 1 is that in step b, 5 ml of concentrated sulfuric acid is placed in the open container.

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Abstract

The invention discloses an acid-steam-assisted preparation method of nickel-iron hydrotalcite nanosheet-foamed nickel, and belongs to the field of preparation of oxygen evolution electrodes under electro-catalytic alkaline conditions. The method comprises the following steps: performing acetone oil removal treatment on a nickel-based current collector, soaking the nickel-based current collector in a ferric chloride solution for sufficient infiltration and ultrasonic treatment for about 5 minutes, then taking out the nickel-based current collector, putting the nickel-based current collector into an acid-resistant container which can be sealed, vacuumizing, and then filling the sealed container with a mixed gas of a specific gas and acid steam, and keeping sealing and the certain temperature for 8-16h, and finally, taking out the nickel-based current collector, repeatedly cleaning the nickel-based current collector with distilled water to obtain the nickel-iron hydrotalcite nanosheet array-nickel electrode, and using the nickel-iron hydrotalcite nanosheet array-nickel electrode as a working electrode in an alkaline electro-catalytic oxygen evolution process. The surface of the prepared nickel catalytic electrode is uniformly covered with a vertically distributed nickel-iron hydrotalcite nanosheet array, and the electrode has excellent alkaline electrocatalytic oxygen evolution activity and good stability under alkaline conditions.

Description

technical field [0001] The invention relates to the technical field of preparation of catalytic electrodes, in particular to a method for preparing acid vapor-assisted nickel-iron hydrotalcite nanosheet-nickel foam. Background technique [0002] With the rapid development of modern society, traditional fossil energy is the power pillar of modern society, and the reserves of fossil energy are decreasing day by day, but the demand for energy is indeed increasing under the demand of development, and the energy crisis is deepening. At the same time, fossil resources have also brought about increasingly serious environmental pollution problems in the process of energy conversion. For example, a large amount of SO will also be produced during the conversion of fossil energy to energy such as motion, heat, and electricity. 2 , NO x , PM 2.5 and other polluting substances. Efficient and clean sustainable energy conversion technology is the most important way to solve the above en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/031C25B11/052C25B11/061C25B11/075B82Y40/00
CPCB82Y40/00C25B1/04Y02E60/36
Inventor 杜世超任志宇
Owner HEILONGJIANG UNIV